Sylvania



(NoModeL) 3 SheetsSheet '1.

J. A. GALVIN. OOMPRESSING 0R BLOWING ENGINE.

' .No. 484,495. Patented Oct. 18, 1892.

(No Model.) 3 SheetsSheet 2.

J.. A. GAL'VINI GOMPRESSING' 0R BLOWING ENGINE.

No. 484,495. Patented Oct. 18, 1892.

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UNITED. STATES PATENT OFFICE.

JAMES A. GALVIN, OF STEELTON, ASSIGNOR OF TIVO-THIRDS TO CASPER DULL, OFHARRISBURG, AND JOHN A. WEIMER, OF LEBANON, PENN SYLVANIA.

SPECIFICATION forming part of Letters Patent No. 484,495, dated October18, 1892.

.A nmn filed April 8. 1892. Serialllo.4218,263- (No model.)

To all whom it may concern:

l 3e it known that I, JAMES A. GALVIN, a citizen of the United States,residing at Steelton, in the county of Dauphin and'State ofPennsylvania, have invented certain new and useful Improvements inCompressing or Blowing Engines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My present invention relates to compress- 1ng or blowing engines, andhas for its object certain improvements in the construction ofvalve-operating mechanism for the compressing mechanism hereinafterfully disclosed and claimed, whereby the cams, eccentrics, levers, andconnecting-rods heretofore used for the purpose are dispensed with andthe valves operated by motors and positive operating devices not liableto excessive wear and tear.

In the accompanying drawings, which form part of this specification, Ihave illustrated the best forms in WhichI have contemplated embodying myinvention.

In the drawings, Figure 1 represents an end View, partly in section, ofa compression-cylinder of a blowing-engine with the bonnet of thedischarge-valve chest removed. Fig. 2 is a side elevation of thecompression-cylinder; Fig. 3, an end view of the same, showing amodification in the Valve-operating mechan-.

ism on a reduced scale; Fig. 4, a side elevation of one end of thecylinder, and Fig. 5 a

similar View of the opposite side of the same end of the cylinder.

Reference being had to the drawings and the letters thereon, A indicatesa compression-cylinder for air or gases, and B the head of the cylinder,in which the air ingress and egress ports are formed and are controlledby the air-inlet valve 0 and the air-discharge Valve D,which may be ofany approved form of construction, preference, however, being given tothe grid-valve and to which either a reciprocating or oscillating motionmay be imparted. In the present construction the motion imparted to thevalves is reciprocating, and to effect the same there is attached to therod a of the inlet-valve O a piston 17,

which operates in a cylinder E, supplied with a motor fluid, which maybe steam or compressed air, through pipes c d, the former supplyingmotor fluid for opening the valve and the latter for closing the same,which communicate with a motor-fiuid-supply chamber or chest F, which iscontrolled by a valve, (not shown,) to which the valve-rod e is attachedand operated from the main engine in any approved manner, such as by alever or an eccentric imparting motion from the piston-rod or from theshaft of the engine. This connection can be readily made by a mechanicskilled in the art to which my invention relates, and therefore requiresno further elucidation. The piston 1) moves the valve 0 in bothdirections to open and close the in gress-ports to the cylinder A. Thedischargevalve D is closed by a piston f, attached to the valve by a rodg and supplied with motor fluid by pipe '6, which is an extension ofpipe 0, and also communicates with the chamber or chest F and is openedwhen an equilibrium is established between the pressure of the air inthe cylinderAand in the discharge-valve chest G, or in the conduit, (notshown,) which in practice is attached to the flange k on the chest G andleads to a receiver or place of consumption. The opening of the valve Dis effected by a spring Z, which surrounds a rod m, also attached to thepiston f, and is seated upon a flange n on the cover 0 on one end of thecylinder H, in which the piston f operates, and is confined in positionby a head p on the outer end of rod m by nuts q, which apply therequisite tension to the spring Z to move the valve.

The equilibrium, to which reference has been made, is effected byexposing the inner end of piston r in cylinder I to the pressure of theair in the chest Gr through an opening heretofore used forthis tand theopposite end of the piston to the pressure of the air in thecompression-cylinder A by a pipe u, which communicates with thecylinders I and A, as shown in Figs. 1, 2, 3, and 4. As the piston ofthe compressioncylinder moves back from the ingress-ports on itsinstroke the inlet-valve O is opened by v the piston 12 in the cylinderE, operated by a motor fluid controlled by a valve operated continuouslyfrom same moving part of the engine and air admitted to the cylinder,and as the piston of the compression-cylinder advances in its compression-stroke the instant the pressure in the cylinder equals thepressure in the chest G and the discharge-conduit the piston 1- isbalanced, when the resiliency of the spring l draws the valve D acrossits seat and opens the egress-ports and holds them open until the pistonhas reached the end of its stroke. Should the spring, from any cause,not act to draw the valve D to open it, the piston 0' will move andeifect the same as soon as the pressure in the'compressiomcylinderexceeds that in the chest Gsufficiently to push the valve across itsseat. By this means an efiective fluid-pressure regulator is producedand all strain on the engine obviated, while the power expended by theengine is applied only to accomplish the work for which it was designed,and the cams, eccentrics, toggles, levers, and connecting-rods purposeare dispensed with.

In Figs. 3, 4, and 5 is shown a modified construction of the cylindersor the motors for operating the inlet and discharge valves. In thisconstruction valvechests a. b are provided for the cylinders E and H,respectively,

the valves of which cross the cylinders and are provided with rods 0 dto be connected to the main engine-shaft or the piston-rod in j similarmanner as rod e is operated,.andthcreby time the operation of the inletand discharge valves to coincide with the stroke of the engine.

Having thus fully described my invention, what I claim is- 1. In acompressing or blowing engine, an air-supply valve, in combination witha flnid pressure motor for operating said valve, a separatedischarge-valve anda fluid-presence motor attached to said valve to moveit in one direction, means independent of the motor for moving saidvalve in the opposite direction, and motor-fluid-supply pipeseoinmunicating with both motors.

2. In a compressing or blowing engine, an air supply valve, afinidpressure motor for opening and closing said valve, adischargevalve, and a fluid-pressure motor for closing said valve. incombination with means independent of the motor for opening said valve.

3. In a compressing or blowing engine, a pp yv and. perat ng mechan smefor, a discharge-valve having a pneumatic pressure-equalizing deviceattached thereto, and a fiuidpressure motor for closing the valve, incombinationn with a. device separate from the motor for automaticallyopening the valve.

4. In a compressing or blowing engine, an air-supply va ve and operatingmechanism therefor, in combination with a dischargevalve having at oneend a cylinder provided with a piston and communicating with thecompressed nir chest or condu t a one e and with thecompressingrcylinder at the 0pposite en and a flu d-pre s r m oconnected to the opposite end o said valve r closing the valve, and aSBPW'M fi iq 1 openi g he va ve- 111a p ssing r bl wing ng ne. amotor-fluid-supp y ambe an a al or controlling thesatnaoperated from theengine, an air-supply valve, a motor ,for operating the same, adischarge-valve, and a motor attached thereto, and both 1110mmcommunicating with said motocfln-id-snpply chamber, in combination witha pressure-equa i ing d v connected to the discharges-valve and suitablemeans for op r ing s id di chargea ve in one di ection ndepend nt of itmotor.

In a p ssi g or blowi g engine, the wmbination of an air-supply valve, amoto for operating the same and Provided with a motor-fluid-supply valvecontrolled from the main engine, an ai ischarge a e, a mo for closi gsai valve and provided w a ui r y va e. a o ontr led f em the ma n ngina fluid-pressure equa zing device attached to the disch rge-v lve, nd ap i e yp a ed dev e for open ng sai 1 discha ge-valve when an eqs ibr umf pressure is established in the discharge conduit and in the ompresing-cylindern e t m ny whereof .I afiix mysignatu e i presence o t o wtnesse JAMES A. GALVIN.

Witnesses ED- ,Rnmofit, H. B. Ramona.

